Dough-raiser.



RT. LEMBKE. DOUGH RAISER. APPLIGATION FILED una, 1912.

Patented Sept. 24, 1912.

inni.,

/NVENTOR FVJTAESSES ,LZ/MM. M m9694141 UNITED. STAWATEET OFC menten, Lumens, ennui; Noemi :oenorii `l To all whom it 'may concern."

Be it known that I, FnANrt T. Lmein, a citizen of 'the VUnited States,- 'residing at Grand Forks.' 'in the county' of Grond Forks e and State otl North ekoto, have invented new and' useful'mprovements in' Dcugb- Reisers, of which the `ollovving 'is s specication. i

My present invention pertains to dough raisers O the lmnp type; und it consists in the peculiar and edvantegeous construction whereby the interior of the raiser is maintained in e heated state and undue heating of the interior and the dough therein -is etfectually prevented in an automat-ic man ner.

The inventionftviil be fully understood from the following description and claim when the sanne are resid in connection with the drawings accompanying and forming art of this specifico-tions in which:

Figure l is o. perspective vievv' illustrating my novel raiser mth the door et the dough chamber in position. F2 is en enturned detail. View, partly in elevation und partly in section, showing' the ineens for eutoi eticully regulating; the heat within the seid chamber. 3 is o detail elevation on a reduced seele, teilten nt :t right angle to Fign Q und showin@` expnnsible member of the heet-regulating ineens and the open freine and the bar between vwhich the said member is interposed.

Similar letters et reference designate corrcsilmnding parte in all of the yiews oit the diz'lvvingf the present oit my invention. t

bei' i et the rfis 'toi-nis u permanent port bottoni of the seid ener-uber n is 'formed by u sheet-metal Welt C, und access is gained, to the chamber t rough the door opening shown in 2., and designed `when the raiser is in use, to be closedv by the door B that is equipped 'with a suitable hunger E :tor ineintaining it in a horizontal position.

Below the bottom C of the chamber i is arranged n hot-oir chamber This hoteir chamber is divided into longitudinei tions by n longitudinal p- 'W' which entends frein one end Weii chamber to/t point zu '..eent the opposite enc. Weit thereof9 sho Byvirtue of s i Y .i Sir which. enters the chamber point partition Well G and then moves to the opposite end of the chamber Where it ,escapes through en opening b. The said opening' may be incneased or diminished insize' by a damper o, as'oceasion demands.

A lamp H is employed to supply the necesn sary heat for the raiser,and over the @him-z ney of the saidia-mp is arrunged'a hood I that is open'et itsupper endy Z lind is connected through e tube f with the before-described opening (n. Under some conditions the upper end'fZ of the hood I is closed by fx disk J, and hencethe heated air received in a causedto traverse the full lengtlvof thechamber, Whereuponit-pesses the end of the- @enracine @rigenerare/tent; frammenti Sept, 24? 191V@ the hood from the lump chimney Will be con- ,l

ducted into the heating clinrnber F of thel the frame ii? e bell-crunk M ulcrurned et g in n brochet n on the outer side of the raiser, n cable N connecting the long erin of the bell crank end the disk d, and a rod P effecting connection between the short arm of the heli .arranged in the elieniber A end opposed to crank and the adjacent Well oit the enpensit ble member; the said rod P being' preferably connected to the short erm ot the bell-crank through the medium of a regulating screw 'i which is threaded through tliebell-crank erm and is connected in n sWiveled-nianner to the outer end ot' tbe rod l?.

The elfpnnsible member L of my novel heet-regulating means is made hollow and with thin Walls, and is designed to oe-titled with a liquid which expands when heated; The seid member L is arranged tiet against the open trame K and snugly bet-Ween seid i trame. and a strep R that extends across thef expensibie member and is iixedly connected;`

et its ende to the trame ii, es best shown 3. By virtue of this construction it;

will be manifest that expansion of the noeL ber L toward the chamber A is efectueliy prevent-ec end i ence said member can only l through the opening in the freine K. outer Weil of the expensible meme" protrnded outa-verd through the opent in the the dish o wii be rpised Il h' r W* Y? trein tile hood, i? weereupon the not en' jef Vln the presentand best practical embodiinent of my invention of which l am cognizant, the rod P. is not connected directly to the outer Wall of the expansible member L, but on the other hand is arranged in and connected toa tube T, which is fixed to and entends outward from the said outer wall and is guided in an aperture in the end wall of the chamber A. The connection of the rod P to the tube T is 'preferably a pivotal one as shown, and hence the said connection is not only strong and durable, but is calculated'to assure movement of the bell-crank M and thelid or disk J when the member L is expanded. It will also be gathered that the heat rf gulating means as a whole is sim ple and inexpensive and is also reliable in operation.' l

When desired, the plate shown in Figs. 1 and 2, which plate carriesthe tube f, may

be made slidable yalongside a fixed plate provided with an aperture. Hence when the tubefis inregistration with the aperture in the Xed plate, hot air can pass from the tube f into chamber F. Also when the tube jr' and the plate by which it is carried are moved, the fixed plate will close communicainsetti tion between the tube f and the chamber F. With this done and the damper c also closed, 40 hot air will be retained in the chamber F. The said damper constructions may be ot any approved type and hence I have deemed it unnecessary to show the apertured plate with which the tube f and the plate which carries said tube cooperate.

Having described my invention, what I claim and desire to secure by Letters-Pat ent, is:l f

The combination of a body having a chamber and an .opening in one wall of the chamber, a lamp for heating the chamber, anl open frame arranged within the chamber and surrounding said opening, a hollow eX pansible member opposed to the inner side ol said frame and adapted to contain an agent that will expand when subjected to heat, a bar Xed against the opposite side of the expansible member, with reference to the open frame, a tube ixedto the outer wall of the expansiblemember and disposed in the opening in the wall of the chamber, a suitably supported bell crank, a connection extending through the said opening and between one arm of the bell crank and the tube on the outer wall of the expansible member, and means connected with the other arm of the bell-crank for controlling the heating of the chamber by the lamp.

A ln testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

' FRANK T. LEMBKE.

Witnesses:

H. A. BRoNsoN, Amin VINJE. 

